I made some changes on my internal firewall and I am now unable to access internet What should I do?

Try to open these ports for outbound traffic: port 53 (for DNS resolution) and port 80 (for http browse). This is a link for document showing you how to configure your firewall: http://technet.microsoft.com/en-us/library/cc875811.aspx Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Best regards.

Another solution which is so simple to realize: in the Windows Firewall dialog box, click Advanced tab, then click on By default and finally click on yes . Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Best regards.

I would like to add an other thing: The default configuration may deny the run of certain programs that you want to allow their use (as an example, I can mention remote desktop). If you have this kind of problems, check Exceptions tab and allow the exception you want. Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Best regards.